drivers/i2c/Kconfig

   1 config DM_I2C
   2         bool "Enable Driver Model for I2C drivers"
   3         depends on DM
   4         help
   5           Enable driver model for I2C. The I2C uclass interface: probe, read,
   6           write and speed, is implemented with the bus drivers operations,
   7           which provide methods for bus setting and data transfer. Each chip
   8           device (bus child) info is kept as parent platdata. The interface
   9           is defined in include/i2c.h. When i2c bus driver supports the i2c
  10           uclass, but the device drivers not, then DM_I2C_COMPAT config can
  11           be used as compatibility layer.
  12
  13 config DM_I2C_COMPAT
  14         bool "Enable I2C compatibility layer"
  15         depends on DM
  16         help
  17           Enable old-style I2C functions for compatibility with existing code.
  18           This option can be enabled as a temporary measure to avoid needing
  19           to convert all code for a board in a single commit. It should not
  20           be enabled for any board in an official release.
  21
  22 config I2C_CROS_EC_TUNNEL
  23         tristate "Chrome OS EC tunnel I2C bus"
  24         depends on CROS_EC
  25         help
  26           This provides an I2C bus that will tunnel i2c commands through to
  27           the other side of the Chrome OS EC to the I2C bus connected there.
  28           This will work whatever the interface used to talk to the EC (SPI,
  29           I2C or LPC). Some Chromebooks use this when the hardware design
  30           does not allow direct access to the main PMIC from the AP.
  31
  32 config I2C_CROS_EC_LDO
  33         bool "Provide access to LDOs on the Chrome OS EC"
  34         depends on CROS_EC
  35         ---help---
  36         On many Chromebooks the main PMIC is inaccessible to the AP. This is
  37         often dealt with by using an I2C pass-through interface provided by
  38         the EC. On some unfortunate models (e.g. Spring) the pass-through
  39         is not available, and an LDO message is available instead. This
  40         option enables a driver which provides very basic access to those
  41         regulators, via the EC. We implement this as an I2C bus which
  42         emulates just the TPS65090 messages we know about. This is done to
  43         avoid duplicating the logic in the TPS65090 regulator driver for
  44         enabling/disabling an LDO.
  45
  46 config DM_I2C_GPIO
  47         bool "Enable Driver Model for software emulated I2C bus driver"
  48         depends on DM_I2C && DM_GPIO
  49         help
  50           Enable the i2c bus driver emulation by using the GPIOs. The bus GPIO
  51           configuration is given by the device tree. Kernel-style device tree
  52           bindings are supported.
  53           Binding info: doc/device-tree-bindings/i2c/i2c-gpio.txt
  54
  55 config SYS_I2C_SANDBOX
  56         bool "Sandbox I2C driver"
  57         depends on SANDBOX && DM_I2C
  58         help
  59           Enable I2C support for sandbox. This is an emulation of a real I2C
  60           bus. Devices can be attached to the bus using the device tree
  61           which specifies the driver to use. As an example, see this device
  62           tree fragment from sandbox.dts. It shows that the I2C bus has a
  63           single EEPROM at address 0x2c (7-bit address) which is emulated by
  64           the driver for "sandbox,i2c-eeprom", which is in
  65           drivers/misc/i2c_eeprom_emul.c.
  66
  67           i2c@0 {
  68                 #address-cells = <1>;
  69                 #size-cells = <0>;
  70                 reg = <0>;
  71                 compatible = "sandbox,i2c";
  72                 clock-frequency = <400000>;
  73                 eeprom@2c {
  74                         reg = <0x2c>;
  75                         compatible = "i2c-eeprom";
  76                         emul {
  77                                 compatible = "sandbox,i2c-eeprom";
  78                                 sandbox,filename = "i2c.bin";
  79                                 sandbox,size = <128>;
  80                         };
  81                 };
  82         };
  83
  84
  85 config SYS_I2C_UNIPHIER
  86         bool "UniPhier I2C driver"
  87         depends on ARCH_UNIPHIER && DM_I2C
  88         default y
  89         help
  90           Support for UniPhier I2C controller driver.  This I2C controller
  91           is used on PH1-LD4, PH1-sLD8 or older UniPhier SoCs.
  92
  93 config SYS_I2C_UNIPHIER_F
  94         bool "UniPhier FIFO-builtin I2C driver"
  95         depends on ARCH_UNIPHIER && DM_I2C
  96         default y
  97         help
  98           Support for UniPhier FIFO-builtin I2C controller driver.
  99           This I2C controller is used on PH1-Pro4 or newer UniPhier SoCs.
 100
 101 source "drivers/i2c/muxes/Kconfig"